Oghenefego Michael Adheke*
The biological diversity of vertebrates is uniquely significant to the concept of phylogeny. Phylogeny is a branch of evolutionary biology that studies the evolutionary relationships between certain organisms. Reptiles and mammals are said to share the same evolutionary ancestry called the amniotic-egged ancestor. This ancestor is divided into two groups; sauropsids (reptiles) and the synapsids (mammals). According to some authors, the broadest group of the reptilian family is the sub-class Squamata. Examples of animals within this sub-class include, lizards, crocodiles, snakes and amphisbaenians [1]. However, man (Homo sapiens) belonging to the primate class, are the most intelligent and complex of all mammals.
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